hey, is anyone here using any of the social bookmarking sites right now? sites like del.icio.us or furl or anything else? for me, safari's bookmarking is incredibly inadequate [firefox is better, but hey] and i was just wondering how popular this social bookmarking fad is.. i would imagine it would be fairly popular with us mac people..just because it seems to fit quite well [great technology, productive + useful]. anyway, was just wondering what you guys think of the whole thing..and if you use it, which particular site do you use? i'm trying incredibly hard to adjust to hitting the del.icio.us button now instead of just dragging links..